1、Designation: D 6447 09An American National StandardStandard Test Method forHydroperoxide Number of Aviation Turbine Fuels byVoltammetric Analysis1This standard is issued under the fixed designation D 6447; the number immediately following the designation indicates the year oforiginal adoption or, in
2、 the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 The test method covers the determination of the hydro-peroxide content of aviation
3、 turbine fuels.The test method mayalso be applicable to the determination of the hydroperoxidecontent of any water-insoluble, organic fluid, particularlydiesel fuels, gasolines, and kerosines.1.2 The values stated in SI units are to be regarded asstandard. No other units of measurement are included
4、in thisstandard.1.3 This standard does not purport to address all the safetyconcerns, if any, associated with its use. It is the responsibilityof the user of this standard to consult and establish appropriatesafety and health practices and determine the applicability ofregulatory limitations prior t
5、o use. For specific warningstatements, see 6.3-6.5, Annex A1, and Annex A2.2. Referenced Documents2.1 ASTM Standards:2D 1193 Specification for Reagent WaterD 3703 Test Method for Hydroperoxide Number of Avia-tion Turbine Fuels, Gasoline and Diesel FuelsD 4057 Practice for Manual Sampling of Petroleu
6、m andPetroleum Products3. Summary of Test Method3.1 A quantity of sample is contacted with aqueous potas-sium iodide solution in the presence of acid. The hydroperox-ides present are reduced by the potassium iodide. An equiva-lent amount of iodine is liberated, which is quantified byvoltammetric ana
7、lysis. The results are calculated and reportedas millimoles (mmole) of hydroperoxide per litre of sample.4. Significance and Use4.1 This test method and Test Method D 3703 measure thesame peroxide species (primarily hydroperoxides) in aviationfuels.4.2 The magnitude of the hydroperoxide number is an
8、indication of the quantity of oxidizing constituents present.Deterioration of fuel results in the formation of hydroperoxidesand other oxygen-carrying compounds. The hydroperoxidenumber measures those compounds that will oxidize potassiumiodide.4.3 The determination of the hydroperoxide number of fu
9、elsis significant because of the adverse effect of hydroperoxidesupon certain elastomers in the fuel systems.5. Apparatus5.1 Voltammetric Analyzer3The instrument used to quan-tify the liberated iodine is a voltammetric analyzer equippedwith a three electrode system and a digital or analog output.The
10、 combination electrode system (see Fig. 1) consists of aglassy carbon disc (3-mm diameter) working electrode, aplatinum wire (0.5 mm diameter) auxiliary electrode, and aplatinum wire (0.5 mm diameter) reference electrode. Thevoltammetric analyzer applies a linear voltage ramp (0 to 1 Vrange with res
11、pect to the reference electrode) at a rate of 0.1V/s to the auxiliary electrode. The current output of theworking electrode is converted to voltage by the voltammetricanalyzer, using the gain ratio of 1V/20A. The peak height orpeak area of the voltammetric response to iodine is outputted toan analog
12、 or digital recording device (0 to 1 V full scale).5.2 Vortex Mixer,4with a 2800 to 3000 rpm motor and apad suitable for mixing test tubes and vials.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD
13、02.05 on Properties of Fuels, Petroleum Coke and Carbon Material.Current edition approved April 15, 2009. Published May 2009. Originallyapproved in 1999. Last previous edition approved in 2003 as D 644703.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer S
14、ervice at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Voltammetric analyzers specifically designed to perform hydroperoxide valuedeterminations of aviation turbine fuels are commercially available from TheUniv
15、ersity of Dayton Research Institute. Voltammographs, which can be set up toperform hydroperoxide value determinations of aviation turbine fuels, are availablefrom BAS, West Lafayette, IN and EG hydroperoxide number;peroxideANNEXES(Mandatory Information)A1. MATERIAL WARNING STATEMENTSA1.1 Hydrochlori
16、c Acid (concentrated)(WarningPoison. Corrosive. Can be fatal if swallowed. Causes severeburns. Harmful if inhaled.)A1.2 Acetic Acid (glacial)(WarningPoison. Corro-sive. Combustible. May be fatal if swallowed. Causes severeburns. Harmful if inhaled.)A1.3 Potassium Dichromate(WarningPoison. Can befata
17、l if swallowed.Avoid contact with eyes and skin, and avoidbreathing of dust. Strong oxidizer. Possible cancer hazard.)A2. PRECAUTIONARY HANDLING STATEMENTSA2.1 The following safety precautions should be followedin handling the materials listed in Annex A1.A2.1.1 Do not get in eyes, on skin, or on cl
18、othing.A2.1.2 Do not breathe vapor, spray, or mist.A2.1.3 Dilute by addition of acid to water.A2.1.4 Keep away from heat and open flame.A2.1.5 Keep in tightly closed container in approved storagecabinet.A2.1.6 Keep cool.A2.1.7 Loosen closure carefully when opening.A2.1.8 Use with adequate ventilatio
19、n.A2.1.9 Keep container closed when not in use.A2.1.10 Use protective clothing and goggles when han-dling.A2.1.11 Wash thoroughly after handling.SUMMARY OF CHANGESSubcommittee D02.05 has identified the location of selected changes to this standard since the last issue(D 644703) that may impact the u
20、se of this standard.(1) Updated 4.1 and 10.1.3.(2) Updated Test Method D 3703 title in Section 2.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determi
21、nation of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or wi
22、thdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that y
23、our comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (si
24、ngle or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).7Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR: D021630.D6447094
